[XFS updates] XFS development tree branch, master, updated. v2.6.38-28508-g9e978d8

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The branch, master has been updated
  9e978d8 "xfs: fix error handling for synchronous writes" revisited
  e44f411 xfs: set cursor in xfs_ail_splice() even when AIL was empty
      from  2ddb4e94065470828e131351566102274ea9e83f (commit)

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- Log -----------------------------------------------------------------
commit 9e978d8f7db1c5de7cdc6450a8ca208db3b95f84
Author: Ajeet Yadav <ajeet.yadav.77 at gmail.com>
Date:   Fri Jul 29 07:42:59 2011 +0000

    "xfs: fix error handling for synchronous writes" revisited
    
    xfs: fix for hang during synchronous buffer write error
    
    If removed storage while synchronous buffer write underway,
    "xfslogd" hangs.
    
    Detailed log http://oss.sgi.com/archives/xfs/2011-07/msg00740.html
    
    Related work bfc60177f8ab509bc225becbb58f7e53a0e33e81
    "xfs: fix error handling for synchronous writes"
    
    Given that xfs_bwrite actually does the shutdown already after
    waiting for the b_iodone completion and given that we actually
    found that calling xfs_force_shutdown from inside
    xfs_buf_iodone_callbacks was a major contributor the problem
    it better to drop this call.
    
    Signed-off-by: Ajeet Yadav <ajeet.yadav.77 at gmail.com>
    Reviewed-by: Christoph Hellwig <hch at lst.de>
    Signed-off-by: Alex Elder <aelder at sgi.com>

commit e44f4112a46ca817fe2758aac7bf7893a64a8c0e
Author: Alex Elder <aelder at sgi.com>
Date:   Fri Jul 22 16:04:41 2011 +0000

    xfs: set cursor in xfs_ail_splice() even when AIL was empty
    
    In xfs_ail_splice(), if a cursor is provided it is updated to
    point to the last item on the list being spliced into the AIL.
    But if the AIL was found to be empty, the cursor (if provided)
    is just initialized instead.
    
    There is no reason the empty AIL case needs to be treated any
    differently.  And treating it the same way allows this code
    to be rearranged a bit, with a somewhat tidier result.
    
    Signed-off-by: Alex Elder <aelder at sgi.com>
    Reviewed-by: Dave Chinner <dchinner at redhat.com>

-----------------------------------------------------------------------

Summary of changes:
 fs/xfs/xfs_buf_item.c  |    1 -
 fs/xfs/xfs_trans_ail.c |   67 ++++++++++++++++++++---------------------------
 2 files changed, 29 insertions(+), 39 deletions(-)


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